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Very nice. I agree that a inertia dyno is a lot simpler and less fiddly than a water or eddy current Dyno. I'm interested in seeing what design and operability challenges exist with a scaled down version of the large commercially available machines. I'm curious to see if I can close a speed loop...

In the near future I plan on building a small engine Dyno. It will most likely be a eddy current type very similar to a Froude EC38, but scaled down. I'll test it by spinning it up on my lathe bed.

Very nice! I'm working on a Boll Aero 18 at the moment. The Cicada is next on my list.

I decided to build and electric furnace so that I can set different temperatures and have the capability of following a "Ramp Soak" profile for investment burnout. Attached is a video that provides an overview. Most of the information to build the furnace I gleaned from YouTube. The heating...

I recently built a furnace for melting aluminum. It runs on 120vac. So far I have just tested it by melting scrap and pouring into a muffin pan. It gets up to 1400 deg F at a rate of 0.5 degree/second. I can provide more detail if anyone is interested.

I've been using AutoCAD for work doing electrical design since R10 and then AutoCAD Electrical. I purchased a 3D printer about a year ago and needed a 3D software package. I downloaded a copy of Fusion 360, which is free for non commercial use. I've been very happy with it. Plenty of YouTube...

Thank you for the compliments and words of encouragement. Expert advice also greatly appreciated! After a lot of running on the 8 X 4 prop. the engine is still a little tight, but I went ahead and changed to a 6 X 4 to try out my new optical tach. With the 8 X4 prop the engine runs at about...

Here is a short video of the break-in. I'm using a 8 X 4 prop. No issues so far. It's a very quiet engine.

Today I finished my first engine. Now to mix some fuel and see if it runs!